Hi all, Thanks! I'll give it a try once I get a LHCP antenna.
Best regards, Cheng Chi On Thu, Jan 30, 2014 at 6:58 AM, Vanush Vaswani <van...@gmail.com> wrote: > The polarisation loss in your case might be 30 dB. Have a look into that. > > Regards, > Vanush > > On Wed, Jan 29, 2014 at 7:45 PM, Sylvain Munaut <246...@gmail.com> wrote: > > Hi, > > > >> I am trying to collect signal from Thuraya-3. Here is the setup I used: > >> - USRP N210 + WBX > >> - LNA with 30dB gain (ZHL-1217MLN) > >> - Iridium Antenna (I don't have specific antenna for Thuraya right now. > >> Since Iridium and Thuraya frequency bands are quite close, I suppose it > >> would work more or less) > >> > >> Center frequency: 1530MHz > >> Sampling rate: 10MHz > >> > >> From the spectrum (attached), I can see the Inmarsat signal, but no > sign of > >> Thuraya signal. Anyone has suggestion about how to receive the thuraya > >> signal? > > > > Several issues to improve : > > > > - Your antenna has the wrong polarization, this will definitely kill > > your signals > > - You can also try more directional types of antenna like described > > here : https://gmr.osmocom.org/trac/wiki/Receiver_Setup > > - Ideally if you have some GSM1800 nearby, it's good to have a filter > > as those signals tend to swamp / saturate inputs when amplified ... > > > > fwiw, I have had some success receiving thuraya by using a GPS antenna > > and just using a big metal surface as a reflector (to swap > > polarization). > > > > > > Cheers, > > > > Sylvain > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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